Abstract: Deep groove ball bearings are used as bearings supporting both side portions of a worm. In the first bearing on the side of a motor, the curvature radius of a raceway groove in an inner ring or the curvature radius of a raceway groove in an outer ring are set to a specific numerical range with respect to the diameter of a ball.

Abstract: A vehicular steering apparatus includes a column bracket secured to a steering column; and a fixing bracket secured to a vehicle body. The column bracket includes a top plate and a pair of side plates. The fixing bracket supports the column bracket via a support shaft. A support-shaft through hole formed in each of the side plates of the column bracket includes a slot extended along a longitudinal direction of the steering column. A resilient member is interposed between the top plate of the column bracket and a confronting portion of the support shaft. The resilient member biases the support shaft along a predetermined biasing direction to restrict play of the support shaft in the slot.

Abstract: A vehicular steering apparatus includes a column bracket secured to a steering column; and a fixing bracket secured to a vehicle body. The column bracket includes a top plate and a pair of side plates. The fixing bracket supports the column bracket via a support shaft. A support-shaft through hole formed in each of the side plates of the column bracket includes a slot extended along a longitudinal direction of the steering column. A resilient member is interposed between the top plate of the column bracket and a confronting portion of the support shaft. The resilient member biases the support shaft along a predetermined biasing direction to restrict play of the support shaft in the slot.

Abstract: A shock absorbing type steering device decreases variations in press fitting loads corresponding to a friction force between two columns. A shock can be appropriately absorbed by relative movements of the two columns in an axial direction. At least one of a first column and a second column press fitted into an opening at one end of the first column is formed with swaged parts on a peripheral wall thereof at a plurality of positions having intervals in a circumferential direction of the column, respectively at a plurality of positions having intervals in an axial direction of the column. Positions of tip ends of the swaged parts are different between a group of swaged parts near the opening at the end of the first column and other groups remote from the opening.

Abstract: An extendable shaft includes a first and a second shaft sections aligned on the same axis. External splines on an outer periphery of the first shaft section engage external splines on an inner periphery of the second shaft section. The first shaft section includes a slit extended from an opening end thereof for a predetermined length along an axial direction. A diametrically contractible portion adapted for elastic reduction in diameter is provided in a region ranging from the opening end of the first shaft section to place away therefrom by the predetermined length along the axial direction. A thin-wall portion is formed in a part of the diametrically contractible portion. A clamping member elastically clamps the diametrically contractible portion.

Abstract: A power steering unit capable of finely controlling the steering assistance power generated by a hydraulic actuator in accordance with the steering direction and driving condition without requiring a complex structure is provided at low cost. The right steering assistance power generating state or the left steering assistance power generating state can be alternatively selected by switching the flow path of hydraulic fluid to the hydraulic actuator 10 for generating the steering assistance power with a motor-operated switching valve 23. The switching valve 23 is controlled so that the steering assistance power acts in accordance with the determined steering direction, and an electric motor 22 for driving a pump 21 is controlled so that the pressure of the hydraulic fluid discharged from the pump 21 is varied in accordance with the determined driving condition.

Abstract: Deep groove ball bearings are used as bearings supporting both side portions of a worm. In the first bearing on the side of a motor, the curvature radius of a raceway groove in an inner ring or the curvature radius of a raceway groove in an outer ring are set to a specific numerical range with respect to the diameter of a ball.

Abstract: A collapsible telescopic steering apparatus includes a steering column having an outer tube and an inner tube. The tubes can be switched between a press-fit state and a loose-fit state. The position of a steering wheel is adjusted by way of relative sliding movement of the loose-fitted tubes along an axial direction thereof. A shock absorbing projection is provided on at least one of an inner periphery of the outer tube and an outer periphery of the inner tube, as confronting to the counterpart tube. The shock absorbing projection is normally spaced away from the counterpart tube but is deformed as pressed against the counterpart tube in association with relative sliding movement of the press-fitted tubes upon collision, thereby absorbing the shock of the collision.

Abstract: A vehicular steering apparatus includes a column bracket secured to a steering column; and a fixing bracket secured to a vehicle body. The column bracket includes a top plate and a pair of side plates. The fixing bracket supports the column bracket via a support shaft. A support-shaft through hole formed in each of the side plates of the column bracket includes a slot extended along a longitudinal direction of the steering column. A resilient member is interposed between the top plate of the column bracket and a confronting portion of the support shaft. The resilient member biases the support shaft along a predetermined biasing direction to restrict play of the support shaft in the slot.

Abstract: A vehicular steering apparatus includes a column bracket secured to a steering column; and a fixing bracket secured to a vehicle body. The column bracket includes a top plate and a pair of side plates. The fixing bracket supports the column bracket via a support shaft. A support-shaft through hole formed in each of the side plates of the column bracket includes a slot extended along a longitudinal direction of the steering column. A resilient member is interposed between the top plate of the column bracket and a confronting portion of the support shaft. The resilient member biases the support shaft along a predetermined biasing direction to restrict play of the support shaft in the slot.

Abstract: A collapsible telescopic steering apparatus comprises a steering column having an inner tube and an outer tube which are engaged with each other. The engagement state of the tubes is switchable between a press-fit state and a loose-fit state. Upon vehicle collision, the tubes in the press-fit state are slid relative to each other for shock absorption. For telescopic adjustment, the tubes in the loose-fit state are slid relative to each other to adjust the fore-and-aft position of a steering wheel.

Abstract: A vehicular steering apparatus includes a column bracket secured to a steering column; and a fixing bracket secured to a vehicle body. The column bracket includes a top plate and a pair of side plates. The fixing bracket supports the column bracket via a support shaft. A support-shaft through hole formed in each of the side plates of the column bracket includes a slot extended along a longitudinal direction of the steering column. A resilient member is interposed between the top plate of the column bracket and a confronting portion of the support shaft. The resilient member biases the support shaft along a predetermined biasing direction to restrict play of the support shaft in the slot.

Abstract: An extendable shaft includes a first and a second shaft sections aligned on the same axis. External splines on an outer periphery of the first shaft section engage external splines on an inner periphery of the second shaft section. The first shaft section includes a slit extended from an opening end thereof for a predetermined length along an axial direction. A diametrically contractible portion adapted for elastic reduction in diameter is provided in a region ranging from the opening end of the first shaft section to place away therefrom by the predetermined length along the axial direction. A thin-wall portion is formed in a part of the diametrically contractible portion. A clamping member elastically clamps the diametrically contractible portion.

Abstract: Disclosed is an electric power steering apparatus in which an electric motor for producing a steering assist force is provided in a steering column. Vibration from the electric motor is transmitted to a member such as a knee protector, for example, supported on the steering column through a bracket. A dynamic damper for restraining resonance of the member to which the vibration is transmitted is provided in the bracket.

Abstract: The present invention provides a shock absorbing type steering device in which variations in press fitting loads corresponding to a friction force between two columns are decreased, whereby a shock can be appropriately absorbed by relative movements of the two columns in an axial direction. According to the shock absorbing type steering device, at least one of a first column and a second column press fitted into an opening at one end of the first column is formed with swaged parts on a peripheral wall thereof at a plurality of positions having intervals in a circumferential direction of the column, respectively at a plurality of positions having intervals in an axial direction of the column. And, positions of tip ends of said swaged parts are difference between a group of swaged parts near the opening at the end of said first column and other groups remote from the opening.

Abstract: A collapsible telescopic steering apparatus includes a steering column having an outer tube and an inner tube. The tubes can be switched between a press-fit state and a loose-fit state. The position of a steering wheel is adjusted by way of relative sliding movement of the loose-fitted tubes along an axial direction thereof. A shock absorbing projection is provided on at least one of an inner periphery of the outer tube and an outer periphery of the inner tube, as confronting to the counterpart tube. The shock absorbing projection is normally spaced away from the counterpart tube but is deformed as pressed against the counterpart tube in association with relative sliding movement of the press-fitted tubes upon collision, thereby absorbing the shock of the collision.

Abstract: A vehicular steering apparatus includes a column bracket secured to a steering column; and a fixing bracket secured to a vehicle body. The column bracket includes a top plate and a pair of side plates. The fixing bracket supports the column bracket via a support shaft. A support-shaft through hole formed in each of the side plates of the column bracket includes a slot extended along a longitudinal direction of the steering column. A resilient member is interposed between the top plate of the column bracket and a confronting portion of the support shaft. The resilient member biases the support shaft along a predetermined biasing direction to restrict play of the support shaft in the slot.

Abstract: A collapsible telescopic steering apparatus comprises a steering column having an inner tube and an outer tube which are engaged with each other. The engagement state of the tubes is switchable between a press-fit state and a loose-fit state. Upon vehicle collision, the tubes in the press-fit state are slid relative to each other for shock absorption. For telescopic adjustment, the tubes in the loose-fit state are slid relative to each other to adjust the fore-and-aft position of a steering wheel.

Abstract: Disclosed is an electric power steering apparatus in which an electric motor for producing a steering assist force is provided in a steering column. Vibration from the electric motor is transmitted to a member such as a knee protector, for example, supported on the steering column through a bracket. A dynamic damper for restraining resonance of the member to which the vibration is transmitted is provided in the bracket.

Abstract: A torque transmission device of a four-wheel drive vehicle having a pair of drive shafts includes a hydraulic pump for transmitting torque to both drive shafts through a variable oil pressure generated therein according to the difference in rotational speed between both drive shafts, and a multiple disc clutch for transmitting torque to both drive shafts by a frictional coupling power. The hydraulic pump has a casing and a rotor housed therein. The casing is rotated by one of the drive shafts. The rotor is rotated by the other drive shaft through a transmitting member, a hydraulic piston mechanism and a rotary sleeve. The transmitting member has a clutch operating portion for operating the clutch. When the transmitted torque exceeds a predetermined level, the hydraulic piston mechanism is adapted to move the transmitting member to operate the multiple disc clutch with no intermediary of the casing.